However, there were some scuffs on the walls, the kitchen counters had some dried food on it and the floors were dirty. 

Yes, they take a little longer to dry clothes (which is why they are coupled with high-efficency / high-spin RPM washers), but use a fraction of the energy.

Many great tenants would not even consider signing a 2-year lease, so you may be missing out of some of the market.From our rental criteria:FINANCIAL/CREDIT HISTORY1.No outstanding debt to previous rental property owners.2.No outstanding debt to utility companies.3.No outstanding debt in excess of $1000 that is not in a payment plan.4.No excessive monthly financial obligations - more than 20% of income.5.Lack of credit history or marginal credit history may result in additional security deposit. 6.Derogatory credit (past due accounts, collections, charge off accounts, tax liens, judgements in excess of $1000 and/or bankruptcy) may result in additional security deposit or denial.

The slab does not show signs of excessive movement which would require structural repairs at this time. 

As for investing our of area, I think you'll need a little more dry powder.

I don't think this is cut and dry but i typically try and see what might need to be done to occupy it, how strong the market is and what do you have to do to get a deal done because you don't want to pass an opportunity for paying a little on the upside but also don't want to overpay on something that has some question marks on it as well ( plus this is work you have to do which it would be good to be compensated for ) 

Our initial estimate suggested that it would take 6 months with 2-3 people working full time and subcontracting dry wallers and siding guys. 

The pictures look like they could have just put excess pressure on the hinges trying to squeeze something through, in which case they're telling the truth but still in the wrong.

Thumbtacks gets paid and leaves the contractor high and dry. 

I would like a separation of gas and electric, framing, dry wall and doors.